<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.big-div{
				width: 300px;
				height: 300px;
				border: red solid 2px;
				padding: 100px;
			}
			.small-div{
				width: 100px;
				height: 100px;
				border: red solid 2px;
				
			}
		</style>
	</head>
	<body>
		<div class="big-div">
			<div class="small-div"></div>
		</div>
	</body>
</html>